great piece. one thing I'd argue against is the "Thrown Rock" as being the original weapon. Paleontologist believe a handheld rock, stick or club would constitute the first weapon, and were not invented by modern humans, but rather our hominid relatives. Humans may have innovated projectiles, as it seems Neanderthals did not hurl their spears, but this is not certain, and I don't believe it, but it is an accepted theory. I just think it's awesomely interesting that the basis of weapons technology began with other species, and we adopted and innovated upon those beginnings.